hi my openfire server is 4.2.3 and i am using smack 4.3.2 but i am always getting this exception

SmackConnection==>org.jivesoftware.smack.SmackException$NoResponseException: No response received within reply timeout. Timeout was 15000ms (~15s). While waiting for establishing TLS
at org.jivesoftware.smack.SynchronizationPoint.checkForResponse(SynchronizationPoint.java:317)
at org.jivesoftware.smack.SynchronizationPoint.checkIfSuccessOrWait(SynchronizationPoint.java:160)
at org.jivesoftware.smack.SynchronizationPoint.checkIfSuccessOrWaitOrThrow(SynchronizationPoint.java:131)
at org.jivesoftware.smack.tcp.XMPPTCPConnection.connectInternal(XMPPTCPConnection.java:914)
at org.jivesoftware.smack.AbstractXMPPConnection.connect(AbstractXMPPConnection.java:409)

I ment making sure there was connectivity between client and server, it’s something frustrating
I’ve encountered myself.

Just to find a starting point, If you temporarily unblacklist those items, does it connect?
I haven’t done anything with the encrypted stuff myself yet, so I don’t know how much help I can be
with this